1756-CFM

1756-CFM

晶閘管調壓主電路、控制電源、同步信號采樣電路、移相信號形成電路、觸發(功放)電路等可稱之調速器的基本電路，這是任何直流調速器都的幾個環節;輸出電壓檢測、輸出電流檢測電路，有時還包括輸入電壓(缺相)檢測、晶閘管模塊溫度檢測電路，可統稱為晶閘管的保護電路，此為輔助電路之一;各種輸入、輸出信號——控制信號處理電路，是提升了設備的可操作控制功能，完成對直流電機的起停、調速、反饋信號處理、調速器工作狀態的指示等，此為輔助電路之二。高、低檔機型的區別和差異，更多地從輔助電路的設計上可看得出來。

其中，主電路結構無論何種機型，都是相同的;同步信號采樣電路與觸發電路，都是大同小異的。移相、保護信號形成電路和控制信號形成電路，則具機型不同，而呈現較大的差異，如對控制信號、保護信號和移相信號的處理，有的機型由簡易模擬電路(晶體管分立元件)來完成，有的采用模擬、數字的硬件電路來完成，機型則采用8位或16位單片機，對所有信號進行智能化處理，使輸出的觸發觸沖信號里“揉和了多重優化的控制信息”，其控制特性便與普通機不可同日而語了。

控制信號處理電路，有的只能完成開環調壓控制，有的也僅能完成簡易的閉環速度調節，處于比例(P)調節的層面上，有的機型則用復雜電路(或軟件手段)來完成PID控制功能，大大提升了系統的動態控制特性。

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